Tie downs must be of the proper type and strength. The combined strength of cargo tie downs must be strong enough to lift _________.

Federal regulations require the aggregate working load limit of any securement system used to secure an article or group of articles against movement must be at least 1/2 times the weight of the article or group of articles. Proper tie-down equipment must be used, including ropes, straps, chains, and tensioning devices (such as, winches, ratchets, and clinching components). Tie-downs must be attached to the vehicle correctly (with hooks, bolts, rails, rings).
[Commercial Driver's License Manual]